Multiple sources of isotopic variation in a terrestrial arthropod community: challenges for disentangling food webs.

@article{Daugherty2007MultipleSO,
  title={Multiple sources of isotopic variation in a terrestrial arthropod community: challenges for disentangling food webs.},
  author={Matthew P. Daugherty and Cheryl J. Briggs},
  journal={Environmental entomology},
  year={2007},
  volume={36 4},
  pages={776-91}
}
Documenting trophic links in a food web has traditionally required complex exclusion experiments coupled with extraordinarily labor-intensive direct observations of predator foraging. Newer techniques such as stable isotope analysis (SIA) may facilitate relatively quick and accurate assessments of consumer feeding behavior. Ratios of N and C isotopes are thought to be useful for determining species' trophic position (e.g., 1 degrees consumer, 2 degrees consumer, or omnivore) and their original… CONTINUE READING